On Tue, 10 May 2016 14:27:20 -0700, sml...@gmail.com wrote:
> It may have to do with their signature (as reported by the
> `.signature` introspection method):
They're actually special-cased in the grammar[^1] based on their name:
If it's possible to determine whether the name belongs to a non-core routine at
the point where the error is emitted in the grammar, that'd be one way of
avoiding the issue.